Bob can paint a fence in 5 hours, and working with jen, the two of them painted a fence in 2 hours. how long would it have taken jen to paint the fence alone?

Step-by-step explanation:

Given

Bob can Paint a fence in 5 hr

so full job can be done in 5 hr

in 1 hr job is done

suppose Jen done the work in x hr

so in 1 hr part of job is done

Also if they combine they can do the job in 2 hr

so in 1 hr

so

step-by-step explanation:

first, eliminate the parenthesis:

3

x

+

2

−

4

x

second, group like terms:

3

x

−

4

x

+

2

third, combine like terms:

(

3

−

4

)

x

+

2

→

−

1

x

+

2

→

−

x

+

2

6 equilateral triangles